Hedges, H. G. (1977). Achievement in basic skills: A longitudinal evaluation of pupil achievement in language arts and mathematics. Ministry of Education, Ontario.
Chicago-Zitierstil (17. Ausg.)Hedges, Harry G. Achievement in Basic Skills: A Longitudinal Evaluation of Pupil Achievement in Language Arts and Mathematics. Toronto: Ministry of Education, Ontario, 1977.
MLA-Zitierstil (9. Ausg.)Hedges, Harry G. Achievement in Basic Skills: A Longitudinal Evaluation of Pupil Achievement in Language Arts and Mathematics. Ministry of Education, Ontario, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.